Granted Patent
Utility
US 4,375,410 · App. 06/213,101
Reciprocating diffuser arrangements in an elongated vessel
Inventors:
Johan C. F. C. Richter, Ole J. Richter
Patented Case
View Patent ↗
Granted: Mar 1, 1983
Filed: Dec 4, 1980
Inventors
Johan C. F. C. Richter
Ole J. Richter
Assignee (at issue)
Kamyr AB
This patent predates the USPTO's electronic file wrapper — prosecution documents from this era exist only in the Patent Office's paper records. A certified copy of the file history can be ordered from the USPTO's paper archives.